Merge lwIP_Ethernet library from PR esp8266#8317

Author: dok-net

Diff for: cores/esp8266/LwipIntfDev.h

@@ -59,7 +59,7 @@ class LwipIntfDev: public LwipIntf, public RawDev
         return IPAddress(ip4_addr_get_u32(ip_2_ip4(&_netif.gw)));
     }
 
-    void setDefault();
+    void setDefault(bool deflt = true);
 
     // true if interface has a valid IPv4 address
     bool connected()
@@ -184,10 +184,10 @@ boolean LwipIntfDev<RawDev>::begin(const uint8_t* macAddress, const uint16_t mtu
         return false;
     }
 
-    _netif.flags |= NETIF_FLAG_UP;
-
     if (localIP().v4() == 0)
     {
+        // IP not set, starting DHCP
+        _netif.flags |= NETIF_FLAG_UP;
         switch (dhcp_start(&_netif))
         {
         case ERR_OK:
@@ -201,6 +201,12 @@ boolean LwipIntfDev<RawDev>::begin(const uint8_t* macAddress, const uint16_t mtu
             return false;
         }
     }
+    else
+    {
+        // IP is set, static config
+        netif_set_link_up(&_netif);
+        netif_set_up(&_netif);
+    }
 
     _started = true;
 
@@ -386,9 +392,9 @@ err_t LwipIntfDev<RawDev>::handlePackets()
 }
 
 template<class RawDev>
-void LwipIntfDev<RawDev>::setDefault()
+void LwipIntfDev<RawDev>::setDefault(bool deflt)
 {
-    _default = true;
+    _default = deflt;
     if (connected())
     {
         netif_set_default(&_netif);

Diff for: libraries/lwIP_Ethernet/examples/EthClient/EthClient.ino

@@ -0,0 +1,81 @@
+/*
+    This sketch establishes a TCP connection to a "quote of the day" service.
+    It sends a "hello" message, and then prints received data.
+
+    This is Ethernet version of:
+    https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/examples/WiFiClient/WiFiClient.ino
+*/
+
+#include <LwipEthernet.h>
+
+Wiznet5500lwIP eth(/*SS*/16);     // <== adapt to your hardware
+
+const char* host = "djxmmx.net";
+const uint16_t port = 17;
+
+void setup() {
+  Serial.begin(115200);
+
+  Serial.println("\nEthernet\n");
+
+  eth.setDefault(true); // default route set through this interface
+  if (!ethInitDHCP(eth)) {
+    Serial.printf("no hardware found\n");
+    while (1) {
+      delay(1000);
+    }
+  }
+
+  while (!eth.connected()) {
+    Serial.printf(".");
+    delay(1000);
+  }
+
+  Serial.printf("Ethernet: IP Address: %s\n",
+                eth.localIP().toString().c_str());
+}
+
+void loop() {
+
+  Serial.print("connecting to ");
+  Serial.print(host);
+  Serial.print(':');
+  Serial.println(port);
+
+  // Use WiFiClient class to create TCP connections
+  // (this class could have been named TCPClient)
+  WiFiClient client;
+  if (!client.connect(host, port)) {
+    Serial.println("connection failed");
+    delay(5000);
+    return;
+  }
+
+  // This will send a string to the server
+  Serial.println("sending data to server");
+  if (client.connected()) {
+    client.println("hello from ESP8266");
+  }
+
+  // wait for data to be available
+  unsigned long timeout = millis();
+  while (client.available() == 0) {
+    if (millis() - timeout > 5000) {
+      Serial.println(">>> Client Timeout !");
+      client.stop();
+      delay(60000);
+      return;
+    }
+  }
+
+  // Read all the lines of the reply from server and print them to Serial
+  Serial.println("receiving from remote server");
+  client.sendAll(Serial); // this peer closes once all data are sent
+
+  // Close the connection
+  Serial.println();
+  Serial.println("closing connection");
+  client.stop();
+
+  delay(600000); // execute once every 10 minutes, don't flood remote service
+}

Diff for: libraries/lwIP_Ethernet/examples/EthClientStatic/EthClientStatic.ino

@@ -0,0 +1,82 @@
+/*
+    This sketch establishes a TCP connection to a "quote of the day" service.
+    It sends a "hello" message, and then prints received data.
+
+    This is Ethernet version of:
+    https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266WiFi/examples/WiFiClient/WiFiClient.ino
+*/
+
+#include <LwipEthernet.h>
+
+#define LOCAL_IP   IPAddress(192,168,0,233)
+#define LOCAL_GW   IPAddress(192,168,0,254)   // <== adapt to your network
+#define LOCAL_MASK IPAddress(255,255,255,0)
+#define DNS        IPAddress(8,8,8,8)
+
+Wiznet5500lwIP eth(/*SS*/16);                 // <== adapt to your hardware
+
+const char* host = "djxmmx.net";
+const uint16_t port = 17;
+
+void setup() {
+  Serial.begin(115200);
+
+  Serial.println("\nEthernet\n");
+
+  eth.setDefault(true); // default route set through this interface
+  if (!ethInitStatic(eth, LOCAL_IP, LOCAL_GW, LOCAL_MASK, DNS)) {
+    // enabling debug message will show the real cause
+    Serial.printf("no hardware found or bad network configuration\n");
+    while (1) {
+      delay(1000);
+    }
+  }
+
+  Serial.printf("Ethernet: IP Address: %s\n",
+                eth.localIP().toString().c_str());
+}
+
+void loop() {
+
+  Serial.print("connecting to ");
+  Serial.print(host);
+  Serial.print(':');
+  Serial.println(port);
+
+  // Use WiFiClient class to create TCP connections
+  // (this class could have been named TCPClient)
+  WiFiClient client;
+  if (!client.connect(host, port)) {
+    Serial.println("connection failed");
+    delay(5000);
+    return;
+  }
+
+  // This will send a string to the server
+  Serial.println("sending data to server");
+  if (client.connected()) {
+    client.println("hello from ESP8266");
+  }
+
+  // wait for data to be available
+  unsigned long timeout = millis();
+  while (client.available() == 0) {
+    if (millis() - timeout > 5000) {
+      Serial.println(">>> Client Timeout !");
+      client.stop();
+      delay(60000);
+      return;
+    }
+  }
+
+  // Read all the lines of the reply from server and print them to Serial
+  Serial.println("receiving from remote server");
+  client.sendAll(Serial); // this peer closes once all data are sent
+
+  // Close the connection
+  Serial.println();
+  Serial.println("closing connection");
+  client.stop();
+
+  delay(600000); // execute once every 10 minutes, don't flood remote service
+}